1211021219983 has 8 divisors (see below), whose sum is σ = 1263685478400. Its totient is φ = 1158357891768.

The previous prime is 1211021219963. The next prime is 1211021219999. The reversal of 1211021219983 is 3899121201121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211021219983 - 2³⁷ = 1073582266511 is a prime.

It is a super-2 number, since 2×1211021219983² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211021219963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4346178 + ... + 4616416.

It is an arithmetic number, because the mean of its divisors is an integer number (157960684800).

Almost surely, 2^{1211021219983} is an apocalyptic number.

1211021219983 is a deficient number, since it is larger than the sum of its proper divisors (52664258417).

1211021219983 is a wasteful number, since it uses less digits than its factorization.

1211021219983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465101.

The product of its (nonzero) digits is 15552, while the sum is 40.

The spelling of 1211021219983 in words is "one trillion, two hundred eleven billion, twenty-one million, two hundred nineteen thousand, nine hundred eighty-three".